As savings rates fall, one new cash Isa promises to stay competitive by tracking the Bank of England base rate. By linking the Isa rate to the base rate, this account aims to offer greater consistency. Find out more: best cash Isa rates 2025Is it worth opening? Other providers offer higher ratesHargreaves Lansdown isn't the only provider offering a base rate tracker cash Isa. Results are ordered by term:Account AER Terms Family Building Society Market Tracker Cash Isa 4.3% £1 minimum deposit Marsden Building Society Online Cash Isa 4.3% £5,000 minimum deposit Skipton Building Society Cash Isa Base Rate Tracker 4.16% £1 minimum deposit Leeds Building Society Online Access Cash Isa 4.12% £1,000 minimum deposit Bank of Ireland UK Online Isa Easy Access 4.11% £100 minimum depositSource: Moneyfacts.